Lockyer, Norman, Sir, 1836-1920 · London : Macmillan and Co. · leaf 187
globe must be made parallel with theEarths axis. 338. This is accomplished generally by the use of acompass, the indication of that instrument being cor-rected by its known variation. This variation at presentis about 21° to the west of the true north ; therefore thetrue north Hes 21° to the east… … 339. This done, the pole—the north pole in our case—(liust be elevated to correspond with the latitude of the APPARENT MOVEMENTS. ^IZ place where the globe is used. At the poles this wouldbe 90°, at the equator 0°, and at London 51 ^°.
Astronomy · Solar system
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